package com.steven.concurrent;

import java.util.ArrayList;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class TaskCallable implements Callable<String> {
	private int id;
	
	public TaskCallable(int id) {
		this.id = id;
	}
	
	@Override
	public String call() throws Exception {
		return "result of TaskCallable " + id;
	}
	
	public static void main(String[] args) {
		ExecutorService exec = Executors.newCachedThreadPool();
		ArrayList<Future<String>> results = new ArrayList<Future<String>>();
		
		for (int i = 0; i < 1000; i++) {
			results.add(exec.submit(new TaskCallable(i)));
		}
		for (Future<String> fs : results) {
			try {
				System.out.println(fs.get());
			} catch (Exception e) {
				// TODO: handle exception
			} finally {
				exec.shutdown();
			}
		}
	}

}
